Question

我买了一本关于机器学习的书，它需要一个环境设置。书中的代码是

$ export ML_PATH="$HOME/ml"
$ mkdir -p $ML_PATH

但据我所知，这是Linux / UNIX命令，所以有Windows的替代品吗？

Answer 1

set

（答案必须至少为30个字符。哦，是的，必须。）

Answer 2

public class AnimatedFrame : Frame
{
  private bool IsAnimating { get; set; }
  private UIElement NextContent { get; set; }
  private UIElement PreviousContent { get; set; }
  private Action PreviousContentTransformCleanupDelegate { get; set; }
  private Action NextContentTransformCleanupDelegate { get; set; }

  public AnimatedFrame() => this.Navigating += OnNavigating;

  private void OnNavigating(object sender, NavigatingCancelEventArgs e)
  {
    if (this.IsAnimating 
      || !(e.Content is UIElement nextContent 
        && this.Content is UIElement))
    {
      return;
    }

    e.Cancel = true;
    this.PreviousContent = this.Content as UIElement;
    this.NextContent = nextContent;
    AnimateToNextContent();
  }

  private void AnimateToNextContent()
  {
    PrepareAnimation();
    StartPreviousContentAnimation();
  }

  private void PrepareAnimation()
  {
    this.IsAnimating = true;


    Transform originalPreviousContentTransform = this.PreviousContent.RenderTransform;
    this.PreviousContent.RenderTransform = new TranslateTransform(0, 0);
    this.PreviousContentTransformCleanupDelegate =
      () => this.PreviousContent.RenderTransform = originalPreviousContentTransform;


    Transform originalNextContentTransform = this.NextContent.RenderTransform;
    this.NextContent.RenderTransform = new TranslateTransform(0, 0);
    this.NextContentTransformCleanupDelegate = () => this.NextContent.RenderTransform = originalNextContentTransform;
  }

  private void StartPreviousContentAnimation()
  {
    var unloadAnimation = new Storyboard();
    DoubleAnimation slideOutAnimation = CreateSlideOutAnimation();
    unloadAnimation.Children.Add(slideOutAnimation);

    DoubleAnimation fadeOutAnimation = CreateFadeOutAnimation();
    unloadAnimation.Children.Add(fadeOutAnimation);
    unloadAnimation.Completed += StartNextContentAnimation_OnPreviousContentAnimationCompleted;

    unloadAnimation.Begin();
  }

  private void StartNextContentAnimation_OnPreviousContentAnimationCompleted(object sender, EventArgs e)
  {
    this.Content = this.NextContent;

    var loadAnimation = new Storyboard();
    DoubleAnimation slideInAnimation = CreateSlideInAnimation();
    loadAnimation.Children.Add(slideInAnimation);

    DoubleAnimation fadeInAnimation = CreateFadeInAnimation();
    loadAnimation.Children.Add(fadeInAnimation);
    loadAnimation.Completed += Cleanup_OnAnimationsCompleted;

    loadAnimation.Begin();
  }

  private void Cleanup_OnAnimationsCompleted(object sender, EventArgs e)
  {
    this.PreviousContentTransformCleanupDelegate.Invoke();
    this.NextContentTransformCleanupDelegate.Invoke();
    this.IsAnimating = false;
  }

  private DoubleAnimation CreateFadeOutAnimation()
  {
    var fadeOutAnimation = new DoubleAnimation(1, 0, new Duration(TimeSpan.FromMilliseconds(250)), FillBehavior.HoldEnd)
      {BeginTime = TimeSpan.Zero};
    Storyboard.SetTarget(fadeOutAnimation, this.PreviousContent);
    Storyboard.SetTargetProperty(fadeOutAnimation, new PropertyPath(nameof(UIElement.Opacity)));
    return fadeOutAnimation;
  }

  private DoubleAnimation CreateSlideOutAnimation()
  {
    var slideOutAnimation = new DoubleAnimation(
        0,
        -50,
        new Duration(TimeSpan.FromMilliseconds(250)),
        FillBehavior.HoldEnd)
      {BeginTime = TimeSpan.Zero};

    Storyboard.SetTarget(slideOutAnimation, this.PreviousContent);
    Storyboard.SetTargetProperty(
      slideOutAnimation,
      new PropertyPath(
        $"{nameof(UIElement.RenderTransform)}.({nameof(TranslateTransform)}.{nameof(TranslateTransform.X)})"));
    return slideOutAnimation;
  }

  private DoubleAnimation CreateFadeInAnimation()
  {
    var fadeInAnimation = new DoubleAnimation(0, 1, new Duration(TimeSpan.FromMilliseconds(250)), FillBehavior.HoldEnd);
    Storyboard.SetTarget(fadeInAnimation, this.NextContent);
    Storyboard.SetTargetProperty(fadeInAnimation, new PropertyPath(nameof(UIElement.Opacity)));
    return fadeInAnimation;
  }

  private DoubleAnimation CreateSlideInAnimation()
  {
    var slideInAnimation = new DoubleAnimation(
      -50,
      0,
      new Duration(TimeSpan.FromMilliseconds(250)),
      FillBehavior.HoldEnd);

    Storyboard.SetTarget(slideInAnimation, this.NextContent);
    Storyboard.SetTargetProperty(
      slideInAnimation,
      new PropertyPath(
        $"{nameof(UIElement.RenderTransform)}.({nameof(TranslateTransform)}.{nameof(TranslateTransform.X)})"));
    return slideInAnimation;
  }
}

Windows命令行替代＆＃34; export＆＃34;

2 个答案: